Rybinsk Reservoir

Rybinsk Reservoir. It is one of the largest artificial bodies of water in Europe by surface area, often referred to as the "Rybinsk Sea." Created in the mid-20th century, the reservoir serves critical functions for hydroelectric power, navigation, and water supply for the region. Its creation involved significant environmental and social changes, including the submersion of historic settlements and vast tracts of agricultural land.

Geography and location

The reservoir is situated in the northwest of the European part of Russia, spanning parts of Tver Oblast, Vologda Oblast, and Yaroslavl Oblast. It lies within the Upper Volga region, primarily on the course of the Volga River, with major tributary inputs from the Sheksna River and the Mologa River. The shoreline is highly indented, creating numerous bays and inlets, with the largest expanse of open water found near the dam complex at Rybinsk. Key ports and settlements along its banks include Cherepovets, a major industrial center, and the smaller towns of Vesegonsk and Perebory.

History and construction

Planning for the reservoir began in the 1930s as part of Joseph Stalin's ambitious Soviet industrialization program, specifically the Volga-Baltic Waterway project. Construction of the Rybinsk Hydroelectric Station dam and associated infrastructure was carried out by the state agency Dalstroy, utilizing a significant workforce that included Gulag prisoners. The filling process, which started in 1941 and concluded during World War II, required the deliberate flooding of a vast area, leading to the displacement of over 130,000 residents and the complete submersion of the historic town of Mologa, along with hundreds of villages and several monasteries.

Hydrology and characteristics

With a surface area of approximately 4,580 square kilometers, it is a shallow reservoir with an average depth of 5.6 meters, though it reaches over 30 meters near the dam. The total water volume is about 25.4 cubic kilometers. Its hydrological regime is managed primarily for the Rybinsk Hydroelectric Station, which has an installed capacity of 346 MW, and to ensure stable depths for the Volga–Baltic Waterway. Seasonal fluctuations in water level are controlled, impacting ice formation in winter and flood control in spring, with inflows dominated by the Volga River, Sheksna River, and the submerged Mologa River basin.

Ecology and environmental impact

The creation of the reservoir dramatically altered the local ecosystem, transforming riverine valleys and floodplain forests into a lacustrine environment. This led to the loss of unique habitats and contributed to the decline of species like the Russian desman. The reservoir has experienced issues with eutrophication and pollution, particularly from industrial centers like Cherepovets, which hosts the Severstal metallurgical plant. It remains an important site for migratory birds, including species of ducks and geese, and supports a commercial fishery for species such as bream, zander, and roach.

Economic significance

The reservoir is a cornerstone of regional infrastructure, providing hydroelectric power to the grid of Unified Energy System of Russia. It is a vital link in the Volga–Baltic Waterway, enabling cargo transport between the Caspian Sea, the Sea of Azov, and the Baltic Sea. The waters are used for industrial cooling and municipal supply for cities including Cherepovets and Rybinsk. The fishery, though altered from its pre-reservoir state, remains commercially important, and the reservoir's shores are used for limited recreation and tourism.

Category:Reservoirs in Russia Category:Buildings and structures in Yaroslavl Oblast Category:Volga River